Design And Implementation Of Video Copyright Confirmation And Transaction System Based On Blockchain

In recent years,with the continuous maturity of the short video industry,video,as a carrier of massive information,is full of all aspects of people’s life.However,because the video itself is easy to steal and tamper,violations of video copyright occur from time to time.Traditional video copyright confirmation and transaction platforms often protect video copyright by adding visible watermarks and storing ownership information in a centralized database.It is difficult to distinguish between authorized re creation and illegal theft,and there is a lack of effective transaction tracking means,which often makes it difficult for video copyright owners to confirm and protect their copyright.Therefore,it is necessary and urgent to design a video copyright confirmation and transaction system with the characteristics of transparent and open ownership information,no tampering,no impact on the value of video circulation in the process of copyright confirmation,and traceability of the whole process of video transaction.Due to its uniqueness,non tampering data disclosure and decentralized data storage,blockchain can be used to solve the problems of copyright confirmation,transaction and infringement tracing of video,a digital asset.Digital watermarking has good invisibility and robustness,can assist the blockchain to trace infringement without affecting the aesthetic value of video,and has certain robustness against malicious attacks.Focusing on the possible problems of the above traditional video copyright confirmation and transaction system,this paper designs and implements a video confirmation and transaction system that can trace the whole process based on blockchain technology and video watermarking technology.The main work of this paper is as follows:Firstly,aiming at the problems existing in the business process of the traditional video copyright confirmation and transaction system,this paper puts forward the solution of blockchain combined with video watermark.Invisible watermark embedding maintains the beauty of video,blockchain trusted storage ensures the openness and transparency of data,and video watermark extraction combined with data query on the chain to realize the full traceability of copyright confirmation and transaction process.According to the business requirements,this paper divides the system functions into four functional modules: user management,video copyright confirmation,video transaction and infringement tracing,analyzes the functional requirements,and analyzes the non functional requirements of the system from the aspects of data security,process openness,compatibility,performance and reliability.In addition,in view of the poor time efficiency of the traditional video watermarking algorithm when applied to high-definition long video,a video watermarking algorithm based on three frame difference incremental filtering is proposed in this paper.Through the three frame difference method,the fast moving frames of video are screened at high speed,and the long video is screened incrementally for the second time to balance the average time efficiency of the algorithm.MR-SVD is used to reduce the dimension of the key frames,and the watermark is embedded by SVD combined with QIM method.Experimental results show that the time efficiency of this algorithm is significantly improved compared with the existing methods on the basis of retaining good invisibility and certain robustness.Finally,based on the demand analysis,this paper designs the overall architecture of the system and gives the database design of the system.At the same time,for the system transaction process,in order to ensure the disclosure of transaction behavior and prevent the disclosure of transaction information and original video,this paper designs a blockchain fair transaction scheme combined with the proposed video watermarking algorithm and the system blockchain network architecture.The smart contract module completes the storage and query of data on the chain and acts as a third-party judge for transaction transfer.On the basis of further refining the blockchain fair transaction scheme,this paper designs and implements the functional modules of the system.The test results and analysis of system functional test and non functional test show that the system can meet the needs of users for video copyright confirmation and transaction.To sum up,the video copyright confirmation and transaction system based on blockchain designed in this paper realizes the transparency,tamper proof and traceability of ownership circulation data in the process of video copyright confirmation and transaction without affecting the video aesthetic value and user experience,and provides exploratory practical experience for the implementation of blockchain in the field of video copyright protection.